US5031365A - Method and apparatus for grinding the running and/or guide surfaces of rails or the like - Google Patents

Method and apparatus for grinding the running and/or guide surfaces of rails or the like Download PDF

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Publication number
US5031365A
US5031365A US07/441,762 US44176289A US5031365A US 5031365 A US5031365 A US 5031365A US 44176289 A US44176289 A US 44176289A US 5031365 A US5031365 A US 5031365A
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US
United States
Prior art keywords
rail
roller
running
reversing
abrasive belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/441,762
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English (en)
Inventor
Gerhard Arndt
Hans Guntermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goldschmidt ETB GmbH
Original Assignee
Elektro Thermit GmbH
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Filing date
Publication date
Application filed by Elektro Thermit GmbH filed Critical Elektro Thermit GmbH
Assigned to ELEKTRO-THERMIT GMBH reassignment ELEKTRO-THERMIT GMBH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ARNDT, GERHARD, GUNTERMANN, HANS
Application granted granted Critical
Publication of US5031365A publication Critical patent/US5031365A/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
    • E01B31/02—Working rail or other metal track components on the spot
    • E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
    • E01B31/17—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding
    • E01B31/175—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding using grinding belts

Definitions

  • the invention is directed to a method for grinding a rail head surface which consists of a running surface, a rounding off of the head and outer surfaces, the so-called running and guide surfaces of rails or the like, where the running and/or guide surfaces are ground by an endless revolving abrasive belt movable against the surfaces, as well as an apparatus for performing this method.
  • Welding beads as formed for example, by thermite welding, excess welding deposit, which occurs in electric build-up or resurfacing welding of new rails as well as rail sections to be repaired, however also undulations or rail corrugations causing unevenness in the running or guide surfaces of rails used for railroad tracks, which impair the rolling properties of rail-borne vehicles to a large extent, are removed by the grinding process.
  • a mobile rail grinding machine for performing such a grinding process is known from DE-OS 28 01 110, where the running surface is machined, in accordance with the embodiment in FIG. 6 of that reference, by an endless abrasive revolving grinding belt, which is pressed against the running surface of the rail.
  • the grinding belt is supported on the one hand by a drive roller and on the other hand by an additional roller serving for reversal arranged to be spaced from the driver roller. Both these rollers are rotatable around a horizontal axis which extends transversely to the longitudinal axis of the rail. This means that the abrasive belt revolves in the direction of the rail and thus in the travel direction or counter to the travel direction of the machine.
  • the drive roller as well as the reversing roller are either entirely cylindrical or designed to be slightly arched outwardly or convex for better guidance of the abrasive belt. This entails that such a grinding process exclusively leaves an even surface on the running surface of the rails and removes unevenness or welding beads only in this region.
  • the running surfaces consist of several flat surfaces respectively inclined with respect to each other by several angular degrees, which approach very closely the desired shape of the running surface, however, without ever reaching same.
  • the running surface will always have a polygonal cross-section.
  • a device for grinding the running surface of rails is also known from EP-PS 0 110 246, which has a considerably simpler and therefore more economical construction.
  • the head or running surface is machined by means of an endless revolving abrasive belt, which is guided by a drive roller and a contact pressure roller which are both rotatable around a horizontal axis extending transversely to the rail.
  • the abrasive belt revolves in the longitudinal direction of the rail, so that also in this case there always exists a polygonal head or running surface after the machining or grinding process.
  • the contact pressure roller is indeed designed as a profile roller, whose free cross-section corresponds to the running surface of a rail head.
  • a profile contact pressure roller results, however, in an undesirable stretching in the edge regions of the abrasive belt, which entails a very rapid wear or a quick destruction of the abrasive belt. This is the reason why such a profile contact pressure roller is not used in actual practice.
  • one aspect of the present invention resides in a method in which the running and/or guide surfaces of the rail are ground by an abrasive belt revolving transversely to the longitudinal axis of the rail and at least partially embracing the running and/or guide surfaces with prestress.
  • Such a grinding method assures the machining of both arched and convex surfaces of the rails. Polygonal surfaces which resulted from previously known methods do not occur with the present process.
  • the method can be performed with butt connections, with build-up welding, and for removal of undulations and/or groove-shaped unevenness. Streetcar rails can also be easily treated in accordance with this method.
  • the prestress on the belt is adjustable.
  • An apparatus pursuant to the present invention for performing the above method, includes an endless abrasive belt guided on at least one rail.
  • the belt revolves over a drive roller and reversing rollers, spaced from the drive roller, and is movable by the rollers against the surfaces to be ground.
  • the reversing rollers and drive roller have axes parallel to the longitudinal axis of the rail so that the belt revolves transversely to the longitudinal axis of the rail. At least one of the reversing rollers is lowerable beneath the upper edge of the running surface of the rail so as to partially embrace the surface.
  • the drive roller and the reversing rollers are arranged on a raisable and lowerable trolley.
  • the trolley is arranged on a horizontally displaceable guide plate.
  • the belt is stretched or stressed by a roller.
  • the drive roller being useable as the stretching roller.
  • the reversing rollers are arranged on a pivotable bracket.
  • FIG. 1 shows the essential parts of an apparatus pursuant to the present invention, in elevation
  • FIG. 2 shows a particular design of a bracket with reversing rollers corresponding to the apparatus of FIG. 1.
  • FIG. 1 Only one guiding device 4 is shown in FIG. 1 for an apparatus 1 for machining a running surface 2 of a rail 3 by grinding.
  • the guidance device 4 is supported, in a known such and not depicted manner, in a stand which can be moved, for instance, by four revolving rollers manually or by means of a special drive on a rail track or a piece of a rail track consisting of two rails 3.
  • the guiding device 4 has a guide plate 5 which can be displaced upon the guiding device 4 horizontally, in the direction of the twin arrow 6, manually or by means of a special drive wheels is known in the art. Preferably, the displacement is accomplished by means of a threaded spindle with an assigned nut.
  • a trolley 7 is arranged on the guide plate 5, and can be raised or lowered in a non-depicted guidance mechanism in the direction of the twin arrow 8. The raising or lowering of the trolley 7 occurs, for instance, by means of a threaded spindle connected with a drive motor, which both have not been depicted here.
  • the trolley 7 carries a horizontal journal 9a, which extends perpendicularly to the plane of the drawing, at its lower end, upon which a journal lever 9 is pivotably attached.
  • the pivoting of the lever 9 can occur for instance also by a non-depicted threaded spindle which is turned manually or by a mechanical drive
  • the upper end of the lever 9 is configured as a pointer 10, which cooperates with a graduation 11, which has only been outlined here
  • the lever 9 can be set to a predetermined angular position on this scale or graduation 11 in a simple manner.
  • the lower end of the lever 9 carries an approximately V-shaped bracket or stirrup 12 which in this embodiment is formed by two plates 13 connected with each other at a predetermined spacing. These plates 13 are arranged perpendicularly to the plane of the drawing to be one behind the other, so that only the front plate 13 can be seen.
  • the two plates 13 are connected with the lever 9 either by bolts or by welding.
  • One reversing roller 16, 17, respectively is arranged rotatably at the ends of the legs 14, 15 of the bracket 12 between the two legs 14, 15 of both plates 13.
  • Each reversing roller 16, 17, is for instance, made up of several ball bearings arranged next to each other upon an axis.
  • the spacing between the two reversing rollers 16, 17 and with this also between the two legs 14, 15 of the bracket 12, is slightly greater than the width of the head 18 of the rail 3.
  • a drive roller 19 fastened on a shaft 20 of a non-depicted conventional drive motor is located at the upper end of the trolley 7.
  • the drive motor with the drive roller 19 is supported by a non-depicted console which is guided at the trolley 7 so as to be raisable and lowerable.
  • This console is moved in the direction of the twin arrow 21 by an also not-depicted pneumatic spring, for instance a piston cylinder unit which can be acted upon by pneumatic pressure.
  • an endless abrasive belt 22 is placed over the roller, and is sufficiently large or long that it can also be conducted over the two reversing rollers 16, 17.
  • the drive roller 19 is moved upwards so that the abrasive belt 22 is stressed or stretched. This stress entails that the abrasive belt 22 runs in a straight line between the two reversing rollers 16, 17.
  • the apparatus 1 described above is placed with its non-depicted rollers upon a rail track or a piece of rail track in order to machine the rail 3 and subsequently the guide plate 5 is moved horizontally so that the bracket 12 and with it also the trolley 7 are located centrally above the rail 3.
  • the trolley 7 is moved downwards to a point where the lower face of the two revolving rollers 16, 17 is located by a predetermined dimension below the running surface 2 of the track rail. Because of the stress or the prestress on the drive roller 19, the drive roller moves 19 downwards so that the abrasive belt 22 can assume the position between the two reversing rollers 16, 17 depicted in FIG.
  • the running surface 2 is completely embraced or covered by the abrasive belt 22 over its entire width in spite of its arching or convexity.
  • the motor of the drive roller 19 is expediently switched on, so that the abrasive belt 22 revolves in the direction of the arrow 23.
  • the revolving abrasive belt 22 grinds the running surface 2 of the track rail 3, and the apparatus 1 can also be displaced in the axial direction of the rail track 3, if desired.
  • a desired arching or convexity of the rolling surface 2 is generated as a function of the stress or amount of stretch of the abrasive belt 22 and height position of the reversing roller 16, 17.
  • the bracket 12 and with it also the trolley 7 are located centrally above the rail 3, so that a symmetrical running surface 2 is generated.
  • an asymmetrically extending running surface 2 of the rail 3 can be produced.
  • Such a displacement or pivoting also occurs, for instance, if the rolling surface of a grooved rail is being ground.
  • one reversing roller 16 or 17 with a correspondingly small diameter projects into the groove of one rail.
  • additional guide rollers 24 are outlined in FIG. 1 and are meant to ensure that the abrasive belt 22 does not come into contact in an undesirable manner with the bracket 12, the lever 9 or with other parts and thus could be destroyed.
  • a pressure plate 25 is provided at the bracket 12 in the embodiment of FIG. 2, which pressure plate 25 is pressed by a pressure member 26 which is, for instance, a piston cylinder unit acted upon by pneumatic pressure, against the rolling surface of the rail 3.
  • This pressure must herein be selected in such a way, that the abrasive belt 22 does not wear too rapidly.
  • the shape of the running surface 2 of the rail 3 can be influenced as a function of the shape of the pressure surface and the width of the pressure plate 25.
  • the pressure plate 25 can be equipped with channels through which a cooling agent of a cooling circuit passes in order to avoid an undesirable heating of the pressure plate 25.
  • the grinding dust removed from the running surface 2 by the abrasive belt 22 is evacuated towards the sides and does not return to the running surface 2. Impairments of the running surface 2 possibly caused by this dust are therefore eliminated.
  • the drive roller 19 and its motor can be stationary and to provide additionally a special stretching roller for the abrasive belt 22.
  • the bracket 12 can also be rigidly connected with the trolley 7 or the guide plate 5. The motion of the bracket 12, the drive roller 19 or the stretching roller, the trolley 7 and the guide plate 5 can occur by means of a program control known as such.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US07/441,762 1988-11-26 1989-11-27 Method and apparatus for grinding the running and/or guide surfaces of rails or the like Expired - Fee Related US5031365A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840006A DE3840006C1 (de) 1988-11-26 1988-11-26
DE3840006 1988-11-26

Publications (1)

Publication Number Publication Date
US5031365A true US5031365A (en) 1991-07-16

Family

ID=6367977

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/441,762 Expired - Fee Related US5031365A (en) 1988-11-26 1989-11-27 Method and apparatus for grinding the running and/or guide surfaces of rails or the like

Country Status (4)

Country Link
US (1) US5031365A (de)
EP (1) EP0371328A3 (de)
CA (1) CA1301459C (de)
DE (1) DE3840006C1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5997391A (en) * 1996-12-20 1999-12-07 Speno International Sa Device for the continuous and fine reprofiling in situ of the surface of the head of at least one rail of a railway track
US20080194185A1 (en) * 2007-02-12 2008-08-14 Rowlen Michael A Pipe and shaft sander
US7611401B1 (en) 2005-09-30 2009-11-03 Column & Post, Inc. Mount for a belt-sanding apparatus
WO2016101322A1 (zh) * 2014-12-26 2016-06-30 中车北京二七机车有限公司 钢轨打磨装置及钢轨铣磨车

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4220456C1 (de) * 1992-06-23 1993-10-28 Elektro Thermit Gmbh Schienenschleifmaschine
US5577954A (en) * 1995-03-10 1996-11-26 Tohokugiken Industries Co., Ltd. Grinding apparatus of welded residue on seam of rail head
CN110820445A (zh) * 2019-12-04 2020-02-21 北京交通大学 一种砂带磨削式全类型钢轨打磨装置及其打磨方法
IT202200006317A1 (it) * 2022-03-31 2023-10-01 Salvatore Pugliese Dispositivo per la sgrossatura e la levigatura di rotaie ferroviarie

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560102A (en) * 1946-10-24 1951-07-10 Guinn J Edwin Sander
US2976652A (en) * 1959-07-30 1961-03-28 Halortha Engineering Company I Belt sander
US3049841A (en) * 1959-07-13 1962-08-21 Amos E Jackson Portable sanders
US3566549A (en) * 1969-01-21 1971-03-02 James A Britton Flexible all purpose drill attachment
US4249346A (en) * 1977-02-21 1981-02-10 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Mobile rail grinding machine and method
US4768312A (en) * 1987-03-06 1988-09-06 Williams & White Machine Shop Ltd. Rail grinding machine
US4896460A (en) * 1987-05-12 1990-01-30 Franz Plasser Bahnbaumaschinen Industriegesellschaft M.B.H. Rail grinding machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT357593B (de) * 1977-02-21 1980-07-25 Plasser Bahnbaumasch Franz Kontinuierlich verfahrbare schienenschleif- maschine
DE3243602A1 (de) * 1982-11-25 1984-05-30 Elektro-Thermit Gmbh, 4300 Essen Auf einer oder beiden schiene(n) eines gleises verfahrbare schienenschleifmaschine
IT1218120B (it) * 1986-10-01 1990-04-12 Claudio Baldo Macchina molatrice e/o rettificatrice tangenziale
DE8814771U1 (de) * 1988-11-26 1989-01-26 Elektro-Thermit Gmbh, 4300 Essen, De

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2560102A (en) * 1946-10-24 1951-07-10 Guinn J Edwin Sander
US3049841A (en) * 1959-07-13 1962-08-21 Amos E Jackson Portable sanders
US2976652A (en) * 1959-07-30 1961-03-28 Halortha Engineering Company I Belt sander
US3566549A (en) * 1969-01-21 1971-03-02 James A Britton Flexible all purpose drill attachment
US4249346A (en) * 1977-02-21 1981-02-10 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Mobile rail grinding machine and method
US4768312A (en) * 1987-03-06 1988-09-06 Williams & White Machine Shop Ltd. Rail grinding machine
US4896460A (en) * 1987-05-12 1990-01-30 Franz Plasser Bahnbaumaschinen Industriegesellschaft M.B.H. Rail grinding machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5997391A (en) * 1996-12-20 1999-12-07 Speno International Sa Device for the continuous and fine reprofiling in situ of the surface of the head of at least one rail of a railway track
US7611401B1 (en) 2005-09-30 2009-11-03 Column & Post, Inc. Mount for a belt-sanding apparatus
US20080194185A1 (en) * 2007-02-12 2008-08-14 Rowlen Michael A Pipe and shaft sander
US7413505B1 (en) * 2007-02-12 2008-08-19 Rowlen Jr Michael A Pipe and shaft sander
WO2016101322A1 (zh) * 2014-12-26 2016-06-30 中车北京二七机车有限公司 钢轨打磨装置及钢轨铣磨车

Also Published As

Publication number Publication date
DE3840006C1 (de) 1990-07-26
CA1301459C (en) 1992-05-26
EP0371328A3 (de) 1991-07-17
EP0371328A2 (de) 1990-06-06

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Owner name: ELEKTRO-THERMIT GMBH, GERMANY

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